An image is seen on a cell phone which is attached to a lens that absorbs a laser beam projected onto a laboratory worker's finger to test his blood flow, during a demonstration for Reuters at the Ben Gurion University in the southern Israeli city of Beersheva May 25, 2011. An Israeli researcher has created an innovative system, which is still being developed, that uses a cell phone's imaging system to non-invasively detect malaria parasites in the blood, enabling a rapid diagnosis of the disease in field conditions. Picture taken May 25, 2011. REUTERS/Amir Cohen (ISRAEL - Tags: SCI TECH HEALTH)